Six Flags rollercoaster derails in terrifying crash: Four hurt as ride that hits 55mph smashes into tree leaving riders trapped 20ft up

Four people were injured tonight and around 21 others were left hanging 30ft in the air when a roller coaster at Six Flags in Los Angeles derailed.

Los Angeles County Fire Department first responders were called to Six Flags Magic Mountain in Santa Clarita just before 6 p.m. after ride operators said the attraction that hits 55 mph had smashed into a tree.

Rescue crews discovered the terrified passengers clinging to the amusement park ride, according to KTLA. They were using heavy equipment to extract the thrillseekers.

Rescue: Four passengers suffered minor injuries, fire officials said. It was earlier reported that two people suffered serious injuries but this hasn't been confirmed

Trapped: Rescue crews, pictured, discovered the terrified passengers clinging to the amusement park ride, according to KTLA. They were using heavy equipment to extract the thrillseekers

Happier times: The functioning Ninja looks like this

According to the Six Flags website, the ride - called the 'Ninja' - takes riders on a winding track at speeds of 55 mph.

Riders
hang from the track and are swung 90 degrees each way in the 'suspended
swinging roller coaster' that is described as a 'stealth assassin.'

The Ninja coaster can hold up to 28 riders.

'As you shoot down the snake-like steel track you'll grip the hillsides and blast through the trees swiftly, slicing through the landscape. Ninja pivots with precision as you narrowly miss tagging land and water, whipping around at 55 miles per hour,' according to the amusement park's website.

Six Flags Magic Mountain is in the Valencia area of Santa Clarita, about 25 miles north of Los Angeles.